<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Vue.directive</title>
    <script src="vue.js"></script>
</head>
<body>
    <div id="app">
        <input type="text">
    </div>

</body>
    <script>
        const vm = new Vue({
            el:'#app'
        })
        Vue.directive('focus',{
            inserted(el){
                el.focus()
            }
        })
       
    </script>
</html>
